Abscess
An abscess is a collection of pus in any part of the body. In most cases, the area around an abscess is swollen and inflamed.
Causes
Abscesses occur when an area of tissue becomes infected and the body's immune system tries to fight it. White blood cells (WBCs) move through the walls of the blood vessels into the area of the infection and collect in the damaged tissue. During this process, pus forms. Pus is the buildup of fluid, living and dead white blood cells, dead tissue, and bacteria or other foreign substances.
Abscesses can form in almost any part of the body. The skin, under the skin, and the teeth are the most common sites. Abscesses may be caused by bacteria, parasites, and foreign substances.
Abscesses in the skin are easy to see. They are red, raised, and painful. Abscesses in other areas of the body may not be seen, but they may cause organ damage.
Types and locations of abscesses include:
- Abdominal abscess
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Amebic liver abscess
Amebic liver abscess
Amebic liver abscess is a collection of pus in the liver in response to an intestinal parasite called Entamoeba histolytica.
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Anorectal abscess
Anorectal abscess
An anorectal abscess is a collection of pus in the area of the anus and rectum.
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Bartholin abscess
Bartholin abscess
Bartholin abscess is the buildup of pus that forms a lump (swelling) in one of the Bartholin glands. These glands are found on each side of the vagi...
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Brain abscess
Brain abscess
A brain abscess is a collection of pus, immune cells, and other material in the brain, usually from a bacterial or fungal infection.
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Epidural abscess
Epidural abscess
An epidural abscess is a collection of pus (infected material) and germs between the outer covering of the brain and spinal cord and the bones of the...
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Peritonsillar abscess
Peritonsillar abscess
Peritonsillar abscess is a collection of infected material in the area around the tonsils.
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Pyogenic liver abscess
Pyogenic liver abscess
Pyogenic liver abscess is a pus-filled area in the liver.
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Skin abscess
Skin abscess
A skin abscess is a buildup of pus in or on the skin.
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Spinal cord abscess
Spinal cord abscess
Spinal cord abscess is the swelling and irritation (inflammation) and the collection of infected material (pus) and germs in or around the spinal cor...
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Subcutaneous abscess
Subcutaneous abscess
A skin abscess is a buildup of pus in or on the skin.
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Tooth abscess
Tooth abscess
A tooth abscess is a buildup of infected material (pus) in the center of a tooth. It is an infection caused by bacteria.
Exams and Tests
The health care provider will perform a physical exam, focusing on the symptoms of the abscess.
Tests to locate the abscess include:
- Ultrasound
- CT scan
- MRI scan
Often, a sample of fluid will be taken from the abscess and tested to see what type of germ is causing the problem.
Treatment
Treatment varies, but often surgery to drain the abscess, antibiotics, or both are needed.
When to Contact a Medical Professional
Call your provider if you think that you have any type of abscess.
Prevention
Preventing abscesses depends on where they develop. For example, good hygiene can help prevent skin abscesses. Dental hygiene and routine care will prevent tooth abscesses.
Dental hygiene
Tooth decay and gum disease are caused by plaque, a sticky combination of bacteria and food. Plaque begins to build up on teeth within 20 minutes af...
References
De Prisco G, Celinski S, Spak CW. Abdominal abscesses and gastrointestinal fistulas. In: Feldman M, Friedman LS, Brandt LJ, eds. Sleisenger and Fordtran's Gastrointestinal and Liver Disease . 10th ed. Philadelphia, PA: Elsevier Saunders; 2016:chap 28.
Holtzman LC, Hitti E, Harrow J. Incision and drainage. In: Roberts JR, ed. Roberts and Hedges' Clinical Procedures in Emergency Medicine . 6th ed. Philadelphia, PA: Elsevier Saunders; 2014:chap 37.
Tunkel AR. Brain abscess. In: Bennett JE, Dolin R, Blaser MJ, eds. Mandell, Douglas, and Bennett's Principles and Practice of Infectious Diseases, Updated Edition . 8th ed. Philadelphia, PA: Elsevier Saunders; 2015:chap 92.
Review Date: 7/13/2016
Reviewed By: Linda J. Vorvick, MD, Medical Director and Director of Didactic Curriculum, MEDEX Northwest Division of Physician Assistant Studies, Department of Family Medicine, UW Medicine, School of Medicine, University of Washington, Seattle, WA. Also reviewed by David Zieve, MD, MHA, Isla Ogilvie, PhD, and the A.D.A.M. Editorial team.